After NASDAQ OMX Group, Inc. (NASDAQ:NDAQ)’s temporary shut down last week, there are still some concerns about lasting damage to the exchange’s reputation. Even though there haven’t been any material losses reported like there were during Facebook Inc (NASDAQ:FB)’s IPO, such losses would be difficult to measure and traders now have to ask themselves if there is an inherent risk in dealing with some exchanges over others. NASDAQ traffic hasn’t dropped off In the immediate aftermath of the temporary closure, NASDAQ OMX Group, Inc. (NASDAQ:NDAQ) traffic hasn’t dropped off. “We look to NASDAQ’s market share today versus recent levels to determine…